Tesla is moving up production for cheaper cars, Elon Musk said on Tuesday.Christian Marquardt via Getty ImagesElon Musk said Tesla will get cheaper electric vehicles out sooner.The move came after Tesla lowered prices due to falling sales and increasing competition.Tesla's first quarter was marked by fewer deliveries, layoffs, and a stock rout.Elon Musk dangled a long-awaited prize — cheaper Tesla models — in front of investors on Tuesday.